The hole under the steering wheel of a car is used to make the airbag pop up when the car collides, which is an important device to ensure the safety of the owner.
Electronic airbag airbag system is a passive safety protection system (see automobile safety performance), which can provide effective collision protection for passengers when used in conjunction with seat belts. When a car collides, the car airbag can reduce the head injury rate by 25% and the face injury rate by about 80%.